By definition, the correct answer is option D. Scientists can identify an element by looking at the structure of a single atom because the number of protons can be determined, and thus its identity.
All atoms are composed of a central nucleus in which there are particles with a positive electric charge, the protons, and neutron, which is an electrically neutral subatomic particle, around which other particles with a negative electric charge that are electrons move.
Thus, the atom is electrically neutral, since the positive charge of the protons is compensated by the negative charge of the electrons.
Atoms of different elements have different amounts of protons. The atomic number (which is identified by the letter Z) indicates the amount of protons that is present in the nucleus of an atom.
This number is then responsible for defining the electronic configuration of the atom and the chemical properties of the element. Then it is possible to say that the number of protons in the nucleus, that is to say the atomic number Z, of an atom determines its identity.
Finally, the correct answer is option D. Scientists can identify an element by looking at the structure of a single atom because the number of protons can be determined, and thus its identity.
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https://brainly.com/question/5527493?referrer=searchResultshttps://brainly.com/question/24445381What are examples and non-examples of stars?
Answer:
Explanation:
Good Example of a Star- The sun, Star Clusters, The North Star
Bad Examples of a Star-Earth, Galaxies, Solar Systems
Examples of stars: Sun, Stars.
Non-examples of stars: Earth, Moon, Planets.
Why Sun is a star?The Sun, a 4.5 billion-year-old yellow dwarf star and the center of our solar system, is a hot, burning ball of hydrogen and helium. It is the only star in our solar system and is located approximately 93 million miles (150 million kilometers) from Earth. On our home planet, life as we know it would not be possible without the energy of the Sun.Despite being the hub of our solar system and crucial to our existence, the Sun is simply an average-sized star. There have been found stars up to 100 times bigger. Additionally, many solar systems contain multiple stars. Scientists can learn more about the workings of far-off stars by examining our Sun.As a star, the Sun doesn’t have any moons, but the planets and their moons orbit the Sun.To learn more about the sun, refer to https://brainly.com/question/15837114
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5. When placed in water, objects with a density of greater than 1 gm/cm3 will
a: Sink
b:Float
Explain your answer.
Answer:
A: sink
Explanation: If an object's density is:
GREATER than [tex]1gcm^{3}[/tex], it will SINK in water.
LESS than [tex]1gcm^{3}[/tex], it will FLOAT in water.
hope this helps
What are two properties of liquids, solids, gases and matter. What are two important things about them.
2.l
A certain solid has a volume of 35.7 cm and weighs 85 grams. What is its density?
Answer:
The answer is 2.38 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of object = 85 g
volume = 35.7 cm³
We have
[tex]density = \frac{85}{35.7} \\ = 2.380952...[/tex]
We have the final answer as
2.38 g/cm³Hope this helps you
The light bulb converts electrical energy into light and _________
Answer:
The light bulb converts electrical energy into light and heat energy
How much of the moon's bright side can you see during a new moon?
A: 0 percent
B: 10 percent
C: 50 percent
D: 100 percent
Answer:
C 50 percent
Explanation:
A. 0 percent
the moon and the sun aren't lined up on a new moon.
can anyone help me with this question. is there anybody who is an expert in science??
Answer:
Explanation:
GIVEN ; FORCE = 2000 NEWTON
DISPLACEMENT = 10 M
TIME = 50 SECONDS
AS WE KNOW , POWER = WORK / TIME
= WORK = FORCE × DISPLACEMENT = 2000 × 10
= 20000 JOULES
THEN, POWER = 20000/ 50
SO, POWER = 400 WATT ( JOULES / SECOND )
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Rhenium(Re) is made up of 37.4% 185Re and 62.6% 187Re.
The atomic mass of 185Re is 184.953 amu. The atomic mass of 187Re is 186.956 amu.
What is the average atomic mass of rhenium?
186.00 amu
186.207 amu
186.397 amu
187.00 amu
what is neons destiny and mohs hardness
The number of electrons in each of Neon's shells is 2, 8 and its electronic configuration is 1s2 2s2 2p6.
...
Neon Properties.
Melting Point: -248.59°C, -415.462°F, 24.56 K
Neon's destiny is to produce vibrant and attractive colors in neon signs, while Mohs hardness is a scale used to measure the hardness of minerals, and it does not apply to the element neon.
Neon's destiny refers to the role or purpose of the element neon in the natural world. Neon is a noble gas that is commonly used in neon signs due to its vibrant red-orange color when electricity is passed through it. Its destiny, in this context, is to create visually appealing and eye-catching signs.
On the other hand, Mohs hardness is a scale that measures the hardness of minerals. It was developed by Friedrich Mohs in 1812. The scale ranges from 1 to 10, with 1 being the softest and 10 being the hardest mineral.
Now, let's discuss the Mohs hardness of neon. Neon is an element, not a mineral, so it does not have a specific Mohs hardness value. The Mohs hardness scale is specifically designed for minerals, not elements. Therefore, we cannot assign a Mohs hardness value to neon.
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What is the charge of the stable ion of oxygen?
Answer:
(2-)
Explanation:
the compounds 0(2-) is the stable
Pls help me here, thanks in advance
Answer:
i think is
first is 2
second is 3
third is 2
fourth is 2
Answer:
which one do you want me to do there is four questions
the number of valence electrons in an atom with an electron configuration is 1s2 2s2 2p6 3s2 3p4
Answer:
6 valence electrons
Explanation:
The atom you have given is a sulfur atom. It has 6 valence electrons.
Which statement best describes heat and thermal energy?
They are different words for the same thing.
They represent different concepts.
Heat is what happens when thermal energy stops moving between substances.
Thermal energy is what happens when heat moves between substances.
Thermal energy is what happens when heat moves between substances.
Further explanationThermal energy usually refers to the temperature of an object which indicates the energy it has
Temperature is used as a guide to the level of thermal energy from objects
While heat is the transfer of thermal energy
Heat moves when there is a difference in temperature
The amount of heat is influenced by the mass of the object and the difference in temperature
Can be formulated :
Q = m.c.ΔT
Q: heat received or removed by an object (J)
m: object mass (kg)
c: heat type substance (J / kg⁰C)
ΔT: temperature change (⁰C)
Answer:
I dont know why the other one has 5 starts but the answer is They represent different concepts.
How many centimeters are in 15 3/8 inches.
Answer:
39.0525 Cm
Explanation:
Answer:
15 3/8 inches into cm: fifteen and three eights inches are equal to 15 3/8 x 2.54 = 39.0525 centimeters.
Explanation:
hope this helps, have a nice day, please mark me brainliest
What 2 units can be used when measuring volume?
Answer:
The 2 units are Gallons or Litres
Explanation:
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A sample of phosphorus contains 1.38e24 atoms. How many moles of phosphorus is this?
2.3 grams
0.44 grams
2.3 moles
0.44 moles
Answer:
The answer is 2.3 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
N = 1.38 × 10²⁴ atoms
So we have
[tex]n = \frac{1.38 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 2.29235880...[/tex]
We have the final answer as
2.3 molesHope this helps you
Answer:
2.3 moles
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula where n is the number of moles N is the number of entities L is the Avogadro's constant which is 6.02 × 10²³ entities From the question N = 1.38 × 10²⁴ atoms So we have We have the final answer
2.3 moles
Which of the following statements is true? Atoms of isotopes of an element have different numbers of electrons. Atoms of isotopes of an element have different numbers of neutrons. Atoms of the same element all have the same mass. Atoms of isotopes of an element have different numbers of protons.
Answer:
atoms of isotopes of an element have different numbers of neutrons.
Explanation:
isotopes have the same number of protons, but different numbers of neutrons.
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Atoms of isotopes of an element have different numbers of neutrons.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
One element can have isotopes of its own. Isotopes are the atoms of element with same atomic number but different mass number. Example Hydrogen has three isotopres like hydrogen, deuterium and tritium with mass number 1, 2 and 3 respectively. Atoms of isotopes of an element have different numbers of neutrons.
Therefore, atoms of isotopes of an element have different numbers of neutrons. The correct option is option B.
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When a hydrogen carbonate ion reacts with water, water acts as a Brønsted-Lowry base. Choose the reaction that describes this.
A. HCO3−(aq) + H2O(l) ⇌ H3O+(aq) + CO32−(aq)
B. H2CO3(aq) + H2O(l) ⇌ OH−(aq) + H3CO3+(aq)
C. HCO3−(aq) + H2O(l) ⇌ OH−(aq) + H2CO3(aq)
D. HCO3−(aq) + H3O+(aq) ⇌ H2O(l) + H2CO3(aq)
Answer:
The answer would be A to this question.
Please help answer this question correctly. My life depends on it!
Answer:
I looked it up so the answer is for sure A
Explanation:
Plz help!
What needs to be added or taken away to cause a change in state?
Answer:
One change of state happens when you add energy to the substance. This change of state is called melting. By adding energy to the molecules in a solid the molecules begin to move quicker and can break away from the other molecules.
Which description refers to fog?
burns off when it gets dark
extends up to 10 miles into the sky
is found in areas near bodies of water
forms when the ground warms at night after a cool, dry day
Answer:
The correct option is;
Is found near bodies of water
Explanation:
Fog forms as an aerosol which is visible to the eye that normally consists of tiny condensed water vapor droplets or crystals of ice that is formed when air that is warm comes in contact with cool air close to the Earth's surface. Fog can be taken as a stratus like cloud that lies close to the Earth's surface and it normally forms due to the presence of water bodies that are nearby, the topography of the area or the conditions of the wind.
C. Is found near bodies of water
NEED THIS DONE ASAP HELP A GIRL OUT!
Answer:
5) electrons
6) protons
7) neutrons
8) electrons
sorry honey, I don't know 4
What step will decrease the pressure of gas inside and close cubicle container?
Answer:
According to Gay-Lussac's Law The pressure of the gas increases with increase in temperature of the gas when volume of the gas is kept constant
Explanation:
help please.........
Answer:
4625 J
Explanation:
I have no clue what the answer is, can u plz help me?
Answer:
D
Explanation:
Select the correct answer. Consider an atom that has an electron in an excited state. The electron falls to a lower energy level. What effect does that have on the electron? A. The electron releases energy in the form of light. B. The electron absorbs energy in the form of light. C. The electron retains its energy without any change. D. The electron transfers its energy to other electrons.
Answer:
A
Explanation:
The more energy u give the more the electron is able to get far away from the nucleas. So the opposite happens when u take away some energy, it will falll on lower energy state and will radiate the energy difference in form of a photon/light.
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Strontium has an atomic number of 38 and a mass number of 88.
How many neutrons are in one atom of strontium?
38
50
88
126
Produces both urea & bile.
Answer:
Liver
Explanation:
The liver is an accessory digestive organ that is involved in detoxifying metabolites from the blood. It also produces compounds necessary for digestion. Some of these products include urea and bile.
what is the mass number notation for silicon ?
Answer: atomic number 14 and atomic mass 20.086
Explanation:
Have a graph
Sandra reacts 3.345 g of zinc with hydrochloric acid. She obtained 3.956 g of zinc chloride. Calculate the percent composition of chloride in zinc chloride.
Explanation:
One molecule of the antibiotic known as penicillin G has a mass of ... b) If you isolate 115 g of zinc chloride, what is the percent yield of the metal ... This drives off the volatile hydrochloric acid, but the.
As Sandra reacts to the 3.345 g of zinc with hydrochloride acid as HCL the obtained value is about 3.956 g of zinc and the chloride the calculated value is.
The composition of chloride and zinc chloride is formed when a halogen gains an electron and when the Hydrogen chloride is dissolved.one molecule of the antibiotics known the penicillin i.e G has a mass of 115 g of zinc chloride, what is the percent yield of the metal This drives the volatile HCL acid.Learn more about the Sandra.
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